The first time I tried to make ice cream, I forgot to add the cold. Friends had just given me a free ice cream machine and I was hyped up on the thrill of being able to make ice cream in my own kitchen. I read the recipe over and over, but neglected to read the directions to the brand-new appliance quite as carefully. After 40 minutes spinning in the machine, my cream contained no ice, and was just a well-stirred, soupy mess.
Articles from Popular Science
Despite its worldwide popularity as a form of exercise, running—whether it's long-distance or sprinting—is grueling. It not only requires an incredible amount of mental focus and a high pain tolerance, but it's also extremely taxing on the body. Unlike sports such as swimming or cycling, running is a high-impact activity. With each stride, your foot collides with the ground. This impact sends vibrations to every muscle you've got. Over time, that can lead to muscle fatigue and injury.
Summer is finally here. That means lots of sunshine, beaches, hiking, and (for me, at least) armpit stains. I'm tired of ruining my white shirts with nasty yellow-brown sweat blotches. So this spring, I decided to look into alternatives. Believe it or not, it isn't your sweat that causes those noxious stains—it's the aluminum salts in your antiperspirant.
It's an age-old tradition: Millions of Americans, from infants to the elderly, attend fireworks shows for the Fourth of July. There's nothing quite as patriotic as sitting out on a blanket and watching hundreds of explosions light up the sky in honor of your country's birthday. But how do those explosions even happen?
If at first you don't succeed, try, try again. That should be the motto for a NASA mission that has finally launched after no fewer than 11 scrubbed launch attempts.
For 18 million years, the vast expanses of Earth's largest island (no, Australia doesn't count) have been covered by the aptly-named Greenland Ice Sheet, a colossal mass over two kilometers thick that covers 1.7 million square kilometers. But since 1990, scientists have noticed that the ice—which usually melts in the summer and refreezes in colder months—has been melting faster and earlier in the year.
On a 2011 hike through the Indonesian rainforest, Topher White stumbled across a rogue logger cutting down a tree. The man was working just a short distance from the ranger station, but the din of chirping birds and buzzing insects obscured the sound of his chainsaw, keeping him hidden in plain sight.
A lot can happen in 241 million years. Dinosaurs can rise and fall, and so can the Earth itself. Take Switzerland: In the past 241 million years it went from being beachfront property to a mountainous skier's heaven dotted with chalets.
Childbirth is scary. A tiny human has to somehow emerge from what you thought was a pretty tight space. Some bits of you might literally tear open in the process. You're also almost certainly going to poop in front of strangers.
Around the world, fires are failing to spark, and grasslands are suffering. Over the past two decades, the amount of burned land has plummeted globally by nearly 25 percent, an international team of scientists reported today. Satellite images indicate that the rise of commercial agriculture is preventing fires from catching hold, especially in grasslands. This might sound like a good thing, but grasslands and their animal denizens actually depend on wildfires.